One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,5)(4,6)(7,8)(9,10,13,12)(11,15,16,14)(17,18,23,26)(19,27,22,24)(20,21,25,31)(28,32,30,29)(9,11,13,16)(10,14,12,15)(17,19,23,22)(18,24,26,27)(20,28,25,30)(21,29,31,32)(1,2,4,6)(3,5,7,8)(9,10,13,12)(11,14,16,15)(17,18,23,26)(19,27,22,24)(20,21,25,31)(28,32,30,29)(1,2)(3,5)(4,6)(7,8)(17,20,23,25)(18,21,26,31)(19,28,22,30)(24,29,27,32)(1,3,4,7)(2,5,6,8)(9,12,13,10)(11,15,16,14)(17,21)(18,25)(19,29)(20,26)(22,32)(23,31)(24,30)(27,28)(17,22,23,19)(18,24,26,27)(20,30,25,28)(21,29,31,32)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.